Marian Ryan, the Middlesex County district attorney, gave a press conference at the Lexington Police Department on Saturday around 8 p.m. after a deadly police shooting in Lexington, MA. / Credit: Lauren Feeney

A Lexington resident was fatally shot by a police officer outside his home on Mason Street around 1:40 p.m. on Saturday, Marian Ryan, the Middlesex County district attorney, confirmed during a press conference at the Lexington Police Department around 8 p.m. on Saturday. 

Ryan did not name the victim, but said he was a 26-year-old male. 

He had injured himself with a knife so another person at the house called the local police. LPD officers responded first and officers with the North Eastern Massachusetts Law Enforcement Council, or NEMLEC, responded next. 

NEMLEC officers happened to be in town to provide security during Lexington’s annual Patriots’ Day parade, which was held in the Center at 1 p.m. They “would have been called in any event,” Ryan said. 

The officers removed two people from the house and left the 26-year-old male who had cut himself inside. 

The male then “suddenly rushed the officers…clutching a knife,” Ryan said. Two attempts were made to use less than lethal force. A NEMLEC officer from Wilmington, MA, who was responding to the incident, then fatally shot the man. The man was killed on the scene. Asked why the man rushed the officer, Ryan said she did not know. 

The family is asking for privacy to grieve. 

News crews on Mason Street on April 18, 2026. / Credit: Lauren Feeney

The incident on Saturday is reminiscent of another fatal shooting in 2022 in town. Lexington resident Brendan Reilly, who suffered from mental health problems, was shot and killed by a LPD officer after charging another LPD officer with a knife on Feb. 12 2022. Reilly was 35 years old. 

Reilly’s father, Kenneth Reilly, attended the press conference regarding the shooting on Mason Street Saturday. His family is trying to get a law passed that would legally require police to summon emergency medical services when a person in a police interaction appears medically unstable.

“This is something we have to change, we need cameras, the Medical Civil Rights Bill needs to pass, the officers need training and support,” Kenneth told the Observer at the press conference Saturday night. “You can’t be shooting guns and killing people, this kid’s whole life is gone.”

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